Results 91 to 100 of about 3,219 (219)

Habitable Zone Lifetime of Exoplanets around Main Sequence Stars [PDF]

open access: yes, 2013
Funding: Dean's Scholarship at the University of East Anglia.The potential habitability of newly discovered exoplanets is initially assessed by determining whether their orbits fall within the circumstellar habitable zone of their star.
Claire, M.   +3 more
core   +1 more source

Signs of Similar Stellar Obliquity Distributions for Hot and Warm Jupiters Orbiting Cool Stars

open access: yesThe Astronomical Journal
Transiting giant planets provide a natural opportunity to examine stellar obliquities, which offer clues about the origin and dynamical histories of close-in planets.
Marvin Morgan   +5 more
doaj   +1 more source

The timescale for giant planet formation : constraints from the rotational evolution of exoplanet host stars. [PDF]

open access: yes, 2008
The timescale over which planets may form in the circumstellar disks of young stars is one of the main issues of current planetary formation models. We present here new constraints on planet formation timescales derived from the rotational evolution of ...
Bouvier, Jerome
core  

Most Super-Earths Have Less Than 3% Water

open access: yesThe Astrophysical Journal
Super-Earths are highly irradiated, small planets with bulk densities approximately consistent with Earth. We construct combined interior atmosphere models of super-Earths that trace the partitioning of water throughout a planet, including an iron-rich ...
James G. Rogers   +4 more
doaj   +1 more source

Planet formation – implication of statistical properties of exoplanets

open access: yesJournal of Physics: Conference Series, 2010
Models of planetary formation are developed based on the observation of our Solar System, star-forming regions and circumstellar disks and on an the ever increasing number of exoplanetary systems. The solar nebula theory and the planetesimal hypothesis are discussed.
openaire   +1 more source

Early Accretion of Large Amounts of Solids for Directly Imaged Exoplanets

open access: yesThe Astrophysical Journal
As the number of planetary-mass objects (PMOs; ⪅13 M _Jupiter ) at wider separation (⪆10 au) grows, there is emerging evidence that they form differently from their higher-mass brown dwarf counterparts.
Ji Wang
doaj   +1 more source

Glass rain : modelling the formation, dynamics and radiative-transport of cloud particles in hot Jupiter exoplanet atmospheres [PDF]

open access: yes, 2017
The atmospheres of exoplanets are being characterised in increasing detail by observational facilities and will be examined with even greater clarity with upcoming space based missions such as the James Webb Space Telescope (JWST) and the Wide Field ...
Lee, Graham Kim Huat
core  

Sub-Neptunes Show a Stronger Correlation with Cold Jupiters than Super-Earths Especially in Metal-rich Systems

open access: yesThe Astrophysical Journal Letters
The correlation between the inner small planets and cold giants encodes the formation and evolution of planetary systems. It remains unclear if the correlation differs on the two sides of the radius valley.
Di-Chang Chen   +4 more
doaj   +1 more source

Characterisation of exoplanet host stars: A window into planet formation [PDF]

open access: yesProceedings of the International Astronomical Union, 2017
AbstractThe detection of thousands of planets orbiting stars other than the Sun has shown that planets are common throughout the Galaxy. However, the diversity of systems found has also raised many questions regarding the process of planet formation and evolution. Interestingly, but perhaps not unexpectedly, crucial information to constraint the planet
openaire   +1 more source

The Compositions of the HR 8799 Planets Reflect Accretion of Both Solids and Metal-enriched Gas

open access: yesThe Astrophysical Journal
With four giant planets ( m  ∼ 5 M _Jup −10 M _Jup , T _eff  ∼ 900–1200 K) orbiting between 15 and 70 au, HR 8799 provides an unparalleled test bed for studying giant planet formation and probing compositional trends across the protoplanetary disk.
Jerry W. Xuan   +26 more
doaj   +1 more source

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